1220253868 has 24 divisors (see below), whose sum is σ = 2300175360. Its totient is φ = 564772560.

The previous prime is 1220253817. The next prime is 1220253869. The reversal of 1220253868 is 8683520221.

It is a super-2 number, since 2×1220253868² = 2978039004737922848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220253869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211078 + ... + 216781.

It is an arithmetic number, because the mean of its divisors is an integer number (95840640).

Almost surely, 2^1220253868 is an apocalyptic number.

It is an amenable number.

1220253868 is a deficient number, since it is larger than the sum of its proper divisors (1079921492).

1220253868 is a wasteful number, since it uses less digits than its factorization.

1220253868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427917 (or 427915 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 1220253868 is about 34932.1323139599. The cubic root of 1220253868 is about 1068.6038412669.

The spelling of 1220253868 in words is "one billion, two hundred twenty million, two hundred fifty-three thousand, eight hundred sixty-eight".